<template>
	<div class="cart">
		<h4>全部商品</h4>
		<div class="cart-main">
			<div class="cart-th">
				<div class="cart-th1">全部</div>
				<div class="cart-th2">商品</div>
				<div class="cart-th3">单价（元）</div>
				<div class="cart-th4">数量</div>
				<div class="cart-th5">小计（元）</div>
				<div class="cart-th6">操作</div>
			</div>
			<div class="cart-body">
				<ul class="cart-list" v-for="(cart,index) in cartInfoList" :key="cart.id">
					<li class="cart-list-con1">
						<input type="checkbox" name="chk_list" :checked="cart.isChecked==1" @change="changCheckCart(cart,$event)">
					</li>
					<li class="cart-list-con2">
						<img :src="cart.imgUrl">
						<div class="item-msg">{{cart.skuName}}</div>
					</li>
					<li class="cart-list-con4">
						<span class="price">{{cart.cartPrice}}</span>
					</li>
					<li class="cart-list-con5">
						<a href="javascript:void(0)" class="mins" @click="handler('a',-1,cart)">-</a>
						<input autocomplete="off" type="text" :value="cart.skuNum" @change="handler('b',$event.target.value-cart.skuNum,cart)"
						 minnum="1" class="itxt">
						<a href="javascript:void(0)" class="plus" @click="handler('c',1,cart)">+</a>
					</li>
					<li class="cart-list-con6">
						<span class="sum">{{cart.skuNum*cart.skuPrice}}</span>
					</li>
					<li class="cart-list-con7">
						<a class="sindelet" @click="deteleCart(cart)">删除</a>
						<br>
						<a>移到收藏</a>
					</li>
				</ul>
			</div>
		</div>
		<div class="cart-tool">
			<div class="select-all">
				<input class="chooseAll" type="checkbox" :checked="isAllCheck&&cartInfoList.length>0" @change="updataAllCart" >
				<span>全选</span>
			</div>
			<div class="option">
				<a @click="deteleAllCart">删除选中的商品</a>
				<a href="#none">移到我的关注</a>
				<a href="#none">清除下柜商品</a>
			</div>
			<div class="money-box">
				<div class="chosed">已选择
					<span>{{checkAllNum.sum}}</span>件商品</div>
				<div class="sumprice">
					<em>总价（不含运费） ：</em>
					<i class="summoney">{{checkAllNum.sunPic}}</i>
				</div>
				<div class="sumbtn">
					<!-- <a  href="###" target="_blank">结算</a> -->
					<router-link class="sum-btn" to="/trade" >结算</router-link>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
	import {
		mapGetters
	} from 'vuex'
	import throttle from 'lodash/throttle'
	export default {
		name: 'ShopCart',

		mounted() {
			this.getData()
		},
		methods: {
			//派发dispatch，获取购物车数据
			getData() {
				this.$store.dispatch('getCartList')
			},
			//改变商品选中状态
			async changCheckCart(cart,event){
				try{
					let checked = event.target.checked?'1':'0'
					await this.$store.dispatch('checkCartSkuId',{skuId:cart.skuId,isChecked:checked})
					this.getData()
				}catch(e){
					//TODO handle the exception
					console.log(e.message)
				}
			},
			//改变产品的个数
			handler:throttle(async function(type, number, cart) {
				if(type=="a"){
					if(cart.skuNum>1){
						number = -1
					}else{
						number = 0
					}
				}else if(type=="b"){
					if(!(/(^[1-9]\d*$)/.test(number))){
					    alert("应为正整数");
						number=0
					}
				}else{
					number=1
				}
				await this.$store.dispatch('addOrUpdateShopCart', {skuId:cart.skuId,skuNum:number})
				this.getData()
			},500),
			//删除单个产品
			deteleCart: throttle(async function(cart) {
				// console.log(cart)
				try {
					await this.$store.dispatch('deleteCartSkuId', cart.skuId)
					this.getData()
				} catch (e) {
					//TODO handle the exception
					console.log(e.message)
				}

			}, 1000),
			//删除所有选中的商品
			async deteleAllCart(){
				try{
					await this.$store.dispatch('deteleCheckedAllCart')
					this.getData()
				}catch(e){
					//TODO handle the exception
					console.log(e.message)
				}
			},
			//全选或者全不选
			async updataAllCart(event){
				//获取全选按钮的状态
				let isChecked = event.target.checked?'1':'0'
				try{
					await this.$store.dispatch('updataCheckedAllCart',isChecked)
					this.getData()
				}catch(e){
					//TODO handle the exception
					console.log(e.message)
				}
			}
		},
		computed: {
			...mapGetters(['cartList']),
			//购物车数据
			cartInfoList() {
				return this.cartList.cartInfoList || []
			},
			// 计算总金额
			// 判断是否全勾选
			isAllCheck() {
				//every 这个api可以判断，如果有一个item元素的 isChecked != 1，那么久返回false，否则返回true
				return this.cartInfoList.every(item => item.isChecked == '1') //如果没有元素，那么就不选中
			},
			checkAllNum() {
				let sum = 0
				let sunPic = 0
				this.cartInfoList.forEach(item => {
					if (item.isChecked == 1) {
						sum += item.skuNum
						sunPic += (item.skuNum * item.skuPrice)
					}
					// console.log(item)
				})
				return {sum,sunPic}
			}


		},
	}
</script>

<style lang="less" scoped>
	.cart {
		width: 1200px;
		margin: 0 auto;

		h4 {
			margin: 9px 0;
			font-size: 14px;
			line-height: 21px;
		}

		.cart-main {
			.cart-th {
				background: #f5f5f5;
				border: 1px solid #ddd;
				padding: 10px;
				overflow: hidden;

				&>div {
					float: left;
				}

				.cart-th1 {
					width: 25%;

					input {
						vertical-align: middle;
					}

					span {
						vertical-align: middle;
					}
				}

				.cart-th2 {
					width: 25%;
				}

				.cart-th3,
				.cart-th4,
				.cart-th5,
				.cart-th6 {
					width: 12.5%;

				}
			}

			.cart-body {
				margin: 15px 0;
				border: 1px solid #ddd;

				.cart-list {
					padding: 10px;
					border-bottom: 1px solid #ddd;
					overflow: hidden;

					&>li {
						float: left;
					}

					.cart-list-con1 {
						width: 15%;
					}

					.cart-list-con2 {
						width: 35%;

						img {
							width: 82px;
							height: 82px;
							float: left;
						}

						.item-msg {
							float: left;
							width: 150px;
							margin: 0 10px;
							line-height: 18px;
						}
					}


					.cart-list-con4 {
						width: 10%;

					}

					.cart-list-con5 {
						width: 17%;

						.mins {
							border: 1px solid #ddd;
							border-right: 0;
							float: left;
							color: #666;
							width: 6px;
							text-align: center;
							padding: 8px;
						}

						input {
							border: 1px solid #ddd;
							width: 40px;
							height: 33px;
							float: left;
							text-align: center;
							font-size: 14px;
						}

						.plus {
							border: 1px solid #ddd;
							border-left: 0;
							float: left;
							color: #666;
							width: 6px;
							text-align: center;
							padding: 8px;
						}
					}

					.cart-list-con6 {
						width: 10%;

						.sum {
							font-size: 16px;
						}
					}

					.cart-list-con7 {
						width: 13%;

						a {
							color: #666;
						}
					}
				}
			}
		}

		.cart-tool {
			overflow: hidden;
			border: 1px solid #ddd;

			.select-all {
				padding: 10px;
				overflow: hidden;
				float: left;

				span {
					vertical-align: middle;
				}

				input {
					vertical-align: middle;
				}
			}

			.option {
				padding: 10px;
				overflow: hidden;
				float: left;

				a {
					float: left;
					padding: 0 10px;
					color: #666;
				}
			}

			.money-box {
				float: right;

				.chosed {
					line-height: 26px;
					float: left;
					padding: 0 10px;
				}

				.sumprice {
					width: 200px;
					line-height: 22px;
					float: left;
					padding: 0 10px;

					.summoney {
						color: #c81623;
						font-size: 16px;
					}
				}

				.sumbtn {
					float: right;

					a {
						display: block;
						position: relative;
						width: 96px;
						height: 52px;
						line-height: 52px;
						color: #fff;
						text-align: center;
						font-size: 18px;
						font-family: "Microsoft YaHei";
						background: #e1251b;
						overflow: hidden;
					}
				}
			}
		}
	}
</style>
